Operating rod for loading machine

Abstract

The utility model relates to an operating lever for a loading machine. An operating component is arranged in a shell; a torsional spring structure is arranged on at least one side of the control assembly; meanwhile, a tension spring structure is arranged on the same side of the torsional spring structure on at least one side; the torsion spring structure is additionally provided with a tension spring structure, so that redundancy and larger pressure are provided when the operating angle of the operating lever is large; according to the utility model, the structure that the stress application block is combined with the tension spring is additionally arranged on the side of the torsion spring, so that the operating load which is larger than that under the conventional condition can be loaded, the strength is higher, the impact resistance is stronger, and a CAN signal board and an independent power supply circuit board can be configured outside. The torsion spring structure uses a torsion spring with a tangent wire outgoing function, compared with a torsion spring with a non-tangent wire outgoing function, the torsion angle is slightly smaller, but the service life is greatly prolonged. And the adjustment of the meso-position gap and the adjustment of the meso-position pre-pressing are more convenient.

Description

Technical Field

[0001] The embodiment of the utility model relates to a joystick, in particular to a joystick for a loader. Background Art

[0002] The operating conditions of conventional loader joysticks used in the prior art have relatively high requirements for life. Generally speaking, joysticks using ordinary torsion springs or compression springs can only achieve a lifespan of 200 to 300,000 times. Joysticks using only torsion springs or compression springs will form a large mechanical gap under long-term use, resulting in a mid-position gap of the joystick, affecting the reliability and life of the joystick and eventually leading to failure. Utility Model Content

[0003] The embodiment of the present utility model aims to provide a joystick for a loader that can increase the reliability and life of the joystick and uses a torsion spring and a compression spring together.

[0004] In order to achieve the above objectives, the embodiment of the present utility model designs a joystick for a loader, comprising:

[0005] case;

[0006] A manipulation assembly is arranged in the housing;

[0007] a torsion spring structure, wherein the torsion spring structure is provided on at least one side of the operating assembly;

[0008] The tension spring structure is provided on the same side of the torsion spring structure on at least one side; the torsion spring structure also increases the tension spring structure, providing redundancy and greater pressure when the joystick is operated at a large angle.

[0009] Furthermore, in the joystick for a loader described in the utility model, a large leather cover is fixed above the shell.

[0010] Furthermore, in the joystick for a loader described in the present utility model, the housing further includes:

[0011] An upper shell, wherein the upper shell is arranged on the housing;

[0012] a middle frame, fixed below the upper shell;

[0013] A bottom shell is fixed below the middle frame; the operating assembly, the torsion spring structure and the tension spring structure are arranged in a space formed by the upper shell, the middle frame and the bottom shell.

[0014] Furthermore, in the joystick for a loader described in the present invention, a power supply assembly plate is fixed below the operating assembly.

[0015] Furthermore, in the joystick for a loader described in the present utility model, the control assembly further includes:

[0016] a rocker, one end of which is inserted into the upper shell of the housing;

[0017] A stopper bushing is aligned in the hole of the rocker and snapped into the protrusion of the stopper bushing;

[0018] A rocker stopper is inserted into the middle of the stopper bushing; a fixed clamping spring is arranged in the clamping groove of the stopper bushing to clamp the rocker stopper up and down;

[0019] At the lower end of the rocker, the wear-resistant bushings are pressed into the small sliders respectively, the cross-hole shaft is passed through the holes on the rocker and the wear-resistant bushings, and the copper sleeve pin is riveted from bottom to top into the middle hole of the cross-hole shaft;

[0020] The rocker and the small slider are inserted into the middle frame of the housing, and the rotating shaft pin is tightly fixed in the two holes of the middle frame. Similarly, the rotating shaft fixes the large slider with the wear-resistant roller installed on it to the middle frame;

[0021] The large slider and the small slider have corresponding large pin holes and small pin holes on both sides of their bottoms. After the wear-resistant rollers are placed in the grooves, the roller pins are used to lock the two wear-resistant rollers on the large slider and the small slider respectively.

[0022] Furthermore, in the joystick for a loader described in the present invention, the cross-hole rotating shaft and the wear-resistant sleeve are in a transition fit; the copper sleeve pin and the cross-hole rotating shaft are in an interference fit; the rotating shaft and the middle frame are in an interference fit, and the rotating shaft and the small slide are in a clearance fit; the wear-resistant roller and the roller pin are in a clearance fit.

[0023] Furthermore, in the joystick for a loader described in the present utility model, the torsion spring structure further includes:

[0024] A torsion spring is located in a circular torsion spring slot in the middle frame of the housing, and two torsion spring legs of the torsion spring are respectively located in corresponding slots in the large slider and the small slider;

[0025] A spring pressure plate, which is screwed onto the middle frame to serve as a limit for the torsion spring;

[0026] The Hall circuit board is fastened to the middle frame with screws; the other two holes of the Hall circuit board are aligned with the raised positioning columns on the middle frame.

[0027] Furthermore, in the joystick for a loader described in the present utility model, any one of the tension spring structures further includes:

[0028] A tension spring, one end of which is hung on a tension spring hanging angle of the middle frame of the housing;

[0029] The force adding block, the other end of the tension spring is hung in the hook slot of the force adding block; the force adding block is fixed on the middle frame with screws.

[0030] Furthermore, in the joystick for a loader described in the present utility model, a bottom shell is fixed to the bottom of the middle frame with machine screws;

[0031] A signal board box is fixed in the bottom shell, and a signal board is fixed in the signal board box;

[0032] A bottom power supply assembly board is fixed in the bottom shell.

[0033] Furthermore, in the joystick for a loader described in the present invention, the signal board and the Hall circuit board are connected by a connector and a wiring harness, and a Hall chip is provided on each of the signal board and the Hall circuit board.

[0034] Compared to the prior art, the embodiments of the present invention employ a control assembly disposed within a housing; a torsion spring structure is disposed on at least one side of the control assembly; and a tension spring structure is disposed on the same side of at least one torsion spring structure. The torsion spring structure also incorporates a tension spring structure, providing redundancy and greater pressure when the joystick is operated at a large angle. The tension spring structure provides continued pushing travel even after the handle is pushed to its maximum angle, transmitting information to the client controller via CAN, thereby enabling the loader bucket to be locked and fully opened. In the present invention, a force block and tension spring structure are added to the torsion spring side, capable of carrying greater operating loads than conventional conditions, providing increased strength and impact resistance. A CAN signal board and independent power supply circuit board can be configured externally. The torsion spring structure utilizes a tangentially extending torsion spring, which, compared to a non-tangentially extending torsion spring, results in a slightly smaller torsion angle but significantly increased service life. Furthermore, the adjustment of the center clearance and center preload is more easily adjustable. Furthermore, two sets of the same torsion spring structure are installed on one side to increase redundancy and reliability. Even if one torsion spring fails or becomes loose, the spring can still meet actual use, preventing a single failure from directly causing the entire handle to fail. When the joystick is operated at an angle greater than 13 degrees, greater pressure is applied to allow the operator to feel the critical value of actual large-angle operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Figure 1 A schematic diagram of the three-dimensional structure of the present utility model;

[0036] Figure 2 for Figure 1 Explosion diagram of

[0037] Figure 3 A schematic diagram of the operating assembly of the present invention;

[0038] Figure 4 Schematic diagram of the torsion spring structure and the tension spring structure of the present utility model;

[0039] Figure 5 This is a schematic diagram of the signal board and Hall circuit board of the present invention. DETAILED DESCRIPTION

[0040] To make the objectives, technical solutions, and advantages of the present invention more clearly apparent, various embodiments of the present invention will be described in detail below with reference to the accompanying drawings. However, those skilled in the art will appreciate that many technical details are provided in various embodiments of the present invention to facilitate a better understanding of the present application. However, even without these technical details and the various variations and modifications based on the following embodiments, the technical solutions claimed in the claims of this application can be achieved.

[0041] The embodiment of the present utility model relates to a joystick for a loader, such as Figure 1 -to Figure 5 Shown, including:

[0042] The housing 100 serves as the outer shell of the joystick for the loader in this embodiment;

[0043] A manipulation assembly 200 is provided in the housing 100; the manipulation assembly 200 serves as a control lever for the loader in this embodiment;

[0044] A torsion spring structure 300 is provided on at least one side of the operating assembly 200;

[0045] A tension spring structure 400 is also installed on the same side of at least one torsion spring structure 300. This additional tension spring structure 400 provides redundancy and increased pressure when the joystick is operated at large angles. The tension spring structure maintains its travel even after the handle is pushed to its maximum angle. This travel is transmitted to the client controller via CAN, enabling the loader's dump bucket to fully open and lock. The torsion spring structure 300 and the tension spring structure 400 can withstand greater operating loads than normal, providing increased strength and impact resistance. The torsion spring structure 400 utilizes a tangentially wired torsion spring, which reduces the torsion angle slightly compared to angled torsion springs, but significantly increases its service life. It also facilitates adjustment of the center clearance and center preload. Furthermore, two sets of the same torsion spring structure are installed on a single side, providing increased redundancy and reliability. This ensures that even if a single torsion spring fails or becomes loose, a full handle failure is prevented from occurring. Higher pressure is applied when the joystick is operated at an angle greater than 13 degrees, allowing the operator to sense the critical threshold for wide-angle operation.

[0046] In order to achieve the above technical problems, the joystick for the loader in this embodiment is as follows: Figure 1 -to Figure 5 As shown, the large leather case 1 is fixed above the housing 100 .

[0047] In order to achieve the above technical problems, the joystick for the loader in this embodiment is as follows: Figure 1 -to Figure 5 As shown, the housing 100 further includes:

[0048] An upper shell 2 is provided on the housing 100;

[0049] Fix the middle frame 6 below the upper shell 2;

[0050] The bottom shell 12 is fixed below the middle frame 6; the operating assembly 200, the torsion spring structure 300 and the tension spring structure 400 are arranged in the space formed by the upper shell 2, the middle frame 6 and the bottom shell 12. The upper shell 2, the middle frame 6 and the bottom shell 12 constitute the structure of the housing 100.

[0051] In order to achieve the above technical problems, the joystick for the loader in this embodiment is as follows: Figure 1 -to Figure 5 As shown, a power assembly board 10 is fixed below the operating assembly 200; the bottom power assembly board 10 contains a power assembly and a CAN board assembly, which supports the conversion of joystick data from analog to digital, thereby broadening the scope of use of the joystick.

[0052] In order to achieve the above technical problems, the joystick for the loader in this embodiment is as follows: Figure 1 -to Figure 5As shown, the manipulation assembly 200 further includes:

[0053] The rocker 4 has one end inserted into the upper shell 2 of the housing 100;

[0054] The convex point of the stopper bushing 3 is aligned and snapped into the hole of the rocker 4; the stopper bushing 3 and the rocker stopper 13 constitute a stopper structure.

[0055] The rocker stopper 13 is inserted into the middle of the stopper bushing 3; a fixed retaining spring is set in the slot of the stopper bushing 13 to clamp the rocker stopper 13 up and down;

[0056] At the lower end of the rocker 4, press the wear-resistant bushings 5 ​​into the small sliders 24, pass the cross-hole shaft 14 through the holes on the rocker 4 and the wear-resistant bushings 5, and rivet the copper sleeve pin 15 into the middle hole of the cross-hole shaft 14 from bottom to top;

[0057] The rocker 4 and the small slider 24 are inserted into the middle frame 6 of the housing 100, and the shaft pin is tightly fixed in the two holes of the middle frame 6. Similarly, the shaft fixes the large slider 21 with the wear-resistant roller 22 installed on the middle frame 6;

[0058] There are corresponding large pin holes 21-1 and small pin holes 24-1 on both sides of the bottom of the large slider 21 and the small slider 24. After the wear-resistant rollers 22 are placed in the grooves, the roller pins are used to lock the two wear-resistant rollers 22 on the large slider 21 and the small slider 24 respectively.

[0059] In order to achieve the above technical problems, the joystick for the loader in this embodiment is as follows: Figure 1 -to Figure 5 As shown, the cross-hole rotating shaft 14 and the wear-resistant sleeve 5 are in transition fit; the copper sleeve pin 15 and the cross-hole rotating shaft 14 are in interference fit; the rotating shaft 24 and the middle frame 6 are in interference fit, and the small slide 24 are in clearance fit; the wear-resistant roller and the roller pin are in clearance fit.

[0060] In order to achieve the above technical problems, the joystick for the loader in this embodiment is as follows: Figure 1 -to Figure 5 As shown, the torsion spring structure 300 further includes:

[0061] In the annular torsion spring slot of the middle frame 6 of the shell 100, the two torsion spring legs 17-2 of the torsion spring 17 are respectively clamped in the corresponding slots of the large slider 21 and the small slider 24; the torsion spring 17 and the spring pressure plate 18 constitute the structure of the torsion spring structure 300.

[0062] Tighten the spring pressure plate 18 on the middle frame 6 with screws to serve as a limit for the torsion spring;

[0063] Use screws to tighten the Hall effect circuit board 19 on the middle frame 6. Align the other two holes of the Hall effect circuit board 19 with the raised positioning posts on the middle frame 6. The Hall effect circuit board 19 controls the magnetic flux of the Hall effect.

[0064] In order to achieve the above technical problems, the joystick for the loader in this embodiment is as follows: Figure 1 -to Figure 5 As shown, any one of the tension spring structures 400 further includes:

[0065] A tension spring 25, one end of which is hung on the tension spring hanging angle of the middle frame 6 of the housing 100;

[0066] The force adding block 26, the other end of the tension spring 25 is hung in the hook slot 26-1 of the force adding block 26; the force adding block 26 is fixed to the middle frame 6 with screws.

[0067] In order to achieve the above technical problems, the joystick for the loader in this embodiment is as follows: Figure 1 -to Figure 5 As shown, the bottom shell 12 is fixed to the bottom of the middle frame 6 with machine screws;

[0068] The signal board box 8 is fixed in the bottom shell 12, and the signal board 9 is fixed in the signal board box 8;

[0069] The bottom power assembly board 10 is fixed in the bottom housing 12 .

[0070] In order to achieve the above technical problems, the joystick for the loader in this embodiment is as follows: Figure 1 -to Figure 5 As shown, the signal board 9 and the Hall circuit board 19 are connected by connectors and wiring harnesses, and a Hall chip is provided on each of the signal board 9 and the Hall circuit board 19 .

[0071] The installation method of this embodiment is as follows:

[0072] Place the torsion spring 17 into the circular torsion spring slot on the middle frame 6. Engage the two torsion spring legs 17-2 of the torsion spring 17 in the corresponding slots on the large slider 21 and the small slider 23, respectively. Then, use two M3 machine screws to tighten the spring pressure plate 18 into the threaded hole on the middle frame 6 to limit the torsion spring. Use two M3 screws to tighten the Hall effect circuit board 19 into the threaded hole on the middle frame. Align the other two holes on the Hall effect circuit board 19 with the raised positioning posts on the middle frame 6. This completes the installation of the Hall effect circuit board.

[0073] The large slider 21 and the small slider 24 have corresponding pin holes 21-1 and 24-1 on both sides of their bottoms. After the wear-resistant rollers 22 are placed in the grooves, the roller pins 23 are used to lock the two wear-resistant rollers 22 to the large slider 21 and the small slider 24 respectively. After locking, the wear-resistant rollers 22 need to have a clearance fit with the roller pins 23 to allow for flexible rotation.

[0074] To pre-assemble the rocker 4, first align the bumps of the stopper bushing 3 into the holes of the rocker 4. There are two stopper bushings 3, which need to be installed in mirror-image alignment. Then, insert the rocker stopper 13 into the center of the stopper bushing 3 and secure it with the E8 retaining spring, which is clamped up and down into the slots of the stopper bushing 3. At the lower end of the rocker 4, press the wear-resistant bushing 5 into the small slider 23. Then, insert the cross-hole shaft 14 through hole 4-1 of the rocker 4 and the holes of the wear-resistant bushing 5. Use the copper sleeve pin 15 to rivet it into the center hole of the cross-hole shaft 14 from bottom to top. The cross-hole shaft 14 and the wear-resistant bushing 5 form a transition fit, while the copper sleeve pin 15 and the cross-hole shaft 14 form an interference fit.

[0075] Insert the assembled rocker 4 and small slider 23 into the middle frame 6, aligning them with the two holes 6-1 of the middle frame 6. Secure them with two rotating shafts 27 on either side. NdFeB magnets are riveted on the inside of the rotating shafts 27. The rotating shafts 27 have an interference fit with the middle frame and a clearance fit with the small slider 23. Then, attach the large slider 21, which has the wear-resistant rollers installed, and similarly secure it to the middle frame 6 using two rotating shafts 27.

[0076] Use the tension spring 25 to hook its ends onto the tension spring hook angles of the middle frame 6-1 and into the hook slots 26-1 of the force block 26. Repeat this process for four force blocks 26 and tension springs 25, then secure the force block 26 to the middle frame 6 using four M4 screws.

[0077] Assemble the signal board 9 into the signal board box 8. Secure the signal board 9 inside the box and encapsulate it with epoxy resin. Then, use four M4 screws to install the power supply assembly board 10 into the four threaded holes at the bottom of the middle frame 6. Use four M4 machine screws to secure the upper case 2 to the threaded holes on the top of the middle frame. Use four M4 machine screws to secure the bottom case 12 to the threaded holes on the bottom of the upper case 2. Finally, tighten the large leather case 1 onto the upper case 2 with an interference fit to complete the assembly.

[0078] The Hall circuit board 19 and the signal board 9 need to be connected using a connector + wiring harness. There is a Hall chip on each of the two PCBs. The Hall chip calibrates the angle change of the joystick and converts the change in magnetic flux passing through the Hall caused by the angle change into a voltage change, thereby realizing signal change processing.

[0079] The bottom power component board 10 contains a power component and a CAN board component, which supports the conversion of joystick data from analog to digital, thereby broadening the scope of use of the joystick.

[0080] Those skilled in the art will appreciate that the above-mentioned embodiments are specific examples for implementing the present invention, and in actual applications, various changes may be made thereto in form and detail without departing from the spirit and scope of the present invention.

Claims

1. A joystick for a loader, characterized in that: include: case; A manipulation assembly is arranged in the housing; a torsion spring structure, wherein the torsion spring structure is provided on at least one side of the operating assembly; The tension spring structure is provided on the same side of the torsion spring structure on at least one side; the torsion spring structure also increases the tension spring structure, providing redundancy and greater pressure when the joystick is operated at a large angle.

2. The joystick for a loader according to claim 1, characterized in that A large leather case is fixed on top of the shell.

3. The joystick for a loader according to claim 1, characterized in that: The housing further comprises: An upper shell, wherein the upper shell is arranged on the housing; a middle frame, fixed below the upper shell; A bottom shell is fixed below the middle frame; the operating assembly, the torsion spring structure and the tension spring structure are arranged in a space formed by the upper shell, the middle frame and the bottom shell.

4. The joystick for a loader according to claim 1, characterized in that A power supply assembly plate is fixed below the operating assembly.

5. The joystick for a loader according to claim 1, characterized in that: The manipulation component further includes: a rocker, one end of which is inserted into the upper shell of the housing; A stopper bushing is aligned in the hole of the rocker and snapped into the protrusion of the stopper bushing; A rocker stopper is inserted into the middle of the stopper bushing; a fixed clamping spring is arranged in the clamping groove of the stopper bushing to clamp the rocker stopper up and down; At the lower end of the rocker, the wear-resistant bushings are pressed into the small sliders respectively, the cross-hole shaft is passed through the holes on the rocker and the wear-resistant bushings, and the copper sleeve pin is riveted from bottom to top into the middle hole of the cross-hole shaft; The rocker and the small slider are inserted into the middle frame of the housing, and the rotating shaft pin is tightly fixed in the two holes of the middle frame. Similarly, the rotating shaft fixes the large slider with the wear-resistant roller installed on it to the middle frame; The large slider and the small slider have corresponding large pin holes and small pin holes on both sides of their bottoms. After the wear-resistant rollers are placed in the grooves, the roller pins are used to lock the two wear-resistant rollers on the large slider and the small slider respectively.

6. The joystick for a loader according to claim 5, characterized in that: There is a transition fit between the cross-hole rotating shaft and the wear-resistant sleeve; there is an interference fit between the copper sleeve pin and the cross-hole rotating shaft; there is an interference fit between the rotating shaft and the middle frame, and a clearance fit between the rotating shaft and the small slide; there is a clearance fit between the wear-resistant roller and the roller pin.

7. The joystick for a loader according to claim 1, characterized in that: The torsion spring structure further includes: A torsion spring is located in a circular torsion spring slot in the middle frame of the housing, and two torsion spring legs of the torsion spring are respectively located in corresponding slots in the large slider and the small slider; A spring pressure plate, which is screwed onto the middle frame to serve as a limit for the torsion spring; The Hall circuit board is fastened to the middle frame with screws; the other two holes of the Hall circuit board are aligned with the raised positioning columns on the middle frame.

8. The joystick for a loader according to claim 1, characterized in that: Any of the tension spring structures further includes: A tension spring, one end of which is hung on a tension spring hanging angle of the middle frame of the housing; The force adding block, the other end of the tension spring is hung in the hook slot of the force adding block; the force adding block is fixed on the middle frame with screws.

9. The joystick for a loader according to claim 8, characterized in that: Fixing the bottom shell to the bottom of the middle frame with machine screws; A signal board box is fixed in the bottom shell, and a signal board is fixed in the signal board box; A bottom power supply assembly board is fixed in the bottom shell.

10. The joystick for a loader according to claim 9, characterized in that: The signal board and the Hall circuit board are connected by a connector and a wiring harness, and a Hall chip is respectively arranged on the signal board and the Hall circuit board.

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